In vacuum, there are two point charges which are 0.3m apart and have the same charge quantity. The electrostatic quantity between them is 1 × 10 to the negative third power In vacuum, there are two point charges which are 0.3m apart and have the same charge quantity. The electrostatic quantity between them is 1 × 10 to the negative third power. How many element charges does each point charge carry?

In vacuum, there are two point charges which are 0.3m apart and have the same charge quantity. The electrostatic quantity between them is 1 × 10 to the negative third power In vacuum, there are two point charges which are 0.3m apart and have the same charge quantity. The electrostatic quantity between them is 1 × 10 to the negative third power. How many element charges does each point charge carry?

F=kqq/r^2
Q = R * radical (F / k) = 0.3 * radical [(10 ^ - 3) / (9 * 10 ^ 9)] = 9.99 * 10 ^ - 8 c
The charge quantity of each point charge is a multiple of the elementary charge
n=(9.99*10^-8)/(1.6*10^-19)=6.24*10^11
Equivalent to 6.24 * 10 ^ 11 elementary charges?

There are two fixed point charges in vacuum, Q1 = + 4.0 * 10 to the negative 8th power and Q2 = + 8.0 * 10 to the negative 8th power
There are two fixed point charges in vacuum, Q1 = + 4.0 * 10 to the negative 8th power and Q2 = + 8.0 * 10 to the negative 8th power. Find out the size and direction of the electric field strength of the point on their line!

Because it is a fixed charge, the electric field of the two points is stable, then the electric field of Q1 is - 4.0 × 10 negative octave
The electric field of Q2 is - 8.0 × 10 - 8 power, then we can get that the direction of electric field intensity on the two-point line is from Q1 to Q2, and the change rule is more and more big

There are two fixed point charges in vacuum, Q1 = + 2.0 * 10 (- 8th power) C, Q2 = + 8.0 * 10 (- 8th power) C. find the direction of P point field strength on the line (q1p = 0.1M, q2p = 0.5m)

E = (kq1 divided by the square of (q1p)) - (KQ2 divided by the square of (q2p))
The substitution result is positive, and the direction is along the q1p direction

There are two fixed point charges in vacuum, Q1 = + 4.0 * 10 to the negative 8th power and Q2 = + 8.0 * 10 to the negative 8th power, q1p = 20cm, q2p = 30cm
There are two fixed point charges in vacuum, Q1 = + 4.0 * 10 to the negative 8th power and Q2 = + 8.0 * 10 to the negative 8th power, q1p = 20cm, q2p = 30cm. Find out the size and direction of the electric field strength of the point on their line!

According to the field strength of the point charge, KQ / R2, Qi and Q2 are 9.0 * 10 and 8.0 * 10, respectively, which are subtracted to the third power of 1.0 * 10